package org.truenewx.tnxjee.repo.jdbc.util;

/**
 * 查询语言常量集
 */
public class QlConstants {

    private QlConstants() {
    }

    public static final String JUNCTION_AND = " and ";
    public static final String JUNCTION_OR = " or ";

    public static final String KEYWORD_IS = " is";
    public static final String KEYWORD_NOT = " not";
    public static final String KEYWORD_NULL = " null";
    public static final String KEYWORD_SELECT = " select ";
    public static final String KEYWORD_UPDATE = " update ";
    public static final String KEYWORD_DELETE = " delete ";
    public static final String KEYWORD_INSERT = " insert into ";
    public static final String KEYWORD_FROM = " from ";
    public static final String KEYWORD_AS = " as ";
    public static final String KEYWORD_WHERE = " where ";
    public static final String KEYWORD_ORDER_BY = " order by ";
    public static final String KEYWORD_GROUP_BY = " group by ";
    public static final String KEYWORD_LEFT_JOIN = " left join ";
    public static final String KEYWORD_RIGHT_JOIN = " right join ";
    public static final String KEYWORD_INNER_JOIN = " inner join ";
    public static final String KEYWORD_OUTER_JOIN = " outer join ";


}
